air opening meaning in English
风巷
通风孔
通风口
Examples
- Compressed air open - circuit self - contained breathing apparatus
压缩空气开路自含式呼吸器 - Care and maintenance of underwater breathing apparatus - recommendations for the compressed air open circuit type
水下呼吸装置维护和保养.第1部分:压缩空气开路式装置推荐标准